Coral growth rate measured during a heatwave experiment done September to November 2018 using reef building corals collected in Kāne'ohe Bay, O'ahu, Hawai'i

Two common reef-building corals, Montipora capitata and Pocillopora acuta, were collected from six sites in Kāne'ohe Bay, O'ahu, Hawai'i. Fragments were allowed to acclimate in experimental tanks for two weeks prior to exposure to one of the following four treatments: Ambient Temperature Ambient pCO2 (ATAC), Ambient Temperature High pCO2 (ATHC), High Temperature Ambient pCO2 (HTAC), and High Temperature High pCO2 (HTHC). The treatment period lasted for a two month period, starting on September 22nd, 2018 and lasting through November 17th, 2018. Following the stress period, coral fragments were exposed to a two-month recovery period in ambient conditions. Every two weeks, corals were measured for buoyant weight to calculate growth rates.

本研究采集了两种常见造礁珊瑚——盾形微孔珊瑚（Montipora capitata）与尖枝列孔珊瑚（Pocillopora acuta），样本取自夏威夷瓦胡岛卡内奥赫湾的6个采样位点。实验开始前，珊瑚断枝先在实验水族箱中驯化两周，随后被分配至以下4种处理组：常温常压二氧化碳分压组（Ambient Temperature Ambient pCO₂, ATAC）、常温高压二氧化碳分压组（Ambient Temperature High pCO₂, ATHC）、高温常压二氧化碳分压组（High Temperature Ambient pCO₂, HTAC）及高温高压二氧化碳分压组（High Temperature High pCO₂, HTHC）。胁迫处理周期为两个月，自2018年9月22日起，至2018年11月17日结束。胁迫处理完成后，所有珊瑚断枝在自然环境条件下开展为期两个月的恢复培养。每两周对珊瑚进行浮力称重，以此计算其生长速率。